The UK grid is asking some households to cut energy use on Monday — a request which is likely to be extended Tuesday — as a plunge in wind power and freezing temperatures across the country test its ability to keep the lights on, Bloomberg News reported. National Grid Plc will use the emergency tool for the first time to help ease a supply squeeze. Starting 5 p.m., customers of Centrica Plc, EON SE and Octopus Energy Ltd. who have signed up for the program will be asked not to use dishwashers or washing machines during a two-hour period of peak demand. The measure offers a stark reminder that Europe’s power crunch is far from over and highlights the danger of the UK’s steadily shrinking generation buffer. It also makes the nation more reliant on imports from France, which is struggling with its own nuclear crisis and can’t export as much as it used to. Read more.